Update multiple MySQL rows with one PHP submit button - php

Question

I am having the hardest time figuring out something that I think should be simple. I need to update multiple rows in my database with one submit button. I have it working with a submit for each row now, but I need to combine it. Here's what I'm trying. Where have I gone wrong? (I've been going off of multiple tutorials I found online and I think I have things all mixed up).
Here's the form:
<?php foreach ($teams as $team):
$id[]=$team['id'];?>
<form action="?update" method="post">
<div class="team-box">
<h2><?php echo $team['name'] ?></h2>
<label for="name">Name:</label>
<input type="text" name="name" value="<?php echo $team['name'] ?>" />
<label for="name">Match Wins:</label>
<input type="text" name="mwins" value="<?php echo $team['mwins'] ?>" />
<label for="name">Match Losses:</label>
<input type="text" name="mlosses" value="<?php echo $team['mlosses'] ?>" />
<label for="name">Match Ties:</label>
<input type="text" name="mties" value="<?php echo $team['mties'] ?>" />
<label for="name">Game Wins:</label>
<input type="text" name="gwins" value="<?php echo $team['gwins'] ?>" />
<label for="name">Game Losses:</label>
<input type="text" name="glosses" value="<?php echo $team['glosses'] ?>" />
<input type="hidden" name="id" value="<?php echo $team['id'] ?>" />
</div>
Here's the PHP to handle the UPDATE:
try
{
foreach($_POST['id'] as $id) {
$sql = 'UPDATE teams SET
name = "' . $_POST['name'.$id] . '",
mwins = "' . $_POST['mwins'.$id] . '",
mlosses = "' . $_POST['mlosses'.$id] . '",
mties = "' . $_POST['mties'.$id] . '",
gwins = "' . $_POST['gwins'.$id] . '",
glosses = "' . $_POST['glosses'.$id] . '"
WHERE id = "' . $_POST['id'.$id] . '"';
$pdo->exec($sql);
}
}
catch (PDOException $e)
{
$error = 'Error adding submitted team: ' . $e->getMessage();
include 'error.html.php';
exit();
}
header('Location: .');
exit();
Thanks in advance!

Answer 1

There are a couple of things that need fixing.
The FORM must be outside the foreach.
The '...name="name" value="...', to agree with the _POST code, should read instead:
... name="name" value="...
This way, a single POST will submit, say,
name123="Rangers"
mwins174="123"
Then you need all IDs. You can do that by issuing, in the foreach, this:
<input type="hidden" name="id[]" value="<?php print $team['id']; ?>" />
This will result in HTML:
<input type="hidden" name="id[]" value="123" />
...
<input type="hidden" name="id[]" value="456" />
and in $_POST['id'] being an array containing 123, 456 and so on.
You could also put in HTML:
<input type="text" name="name[<?php print $team['id']; ?>]" value="...
so that $_POST['name'] would be a vector with the same keys as the values of id, and therefore:
foreach($id as $team_id)
{
// Pseudocode
UPDATE... SET name=$name[$team_id]... WHERE id = $team_id;
}
This way you have one SUBMIT, and multiple UPDATEs.

Answer 2

Since all your field names change for each UPDATE query, you will need to execute separate queries as you already do. I don't think you would be able to perform a single UPDATE query.
I don't understand, what's wrong with executing several update queries?